Minimum of a 90 CFM compressor with a 3/4" chicago style air coupler.  In air compressors, the abbreviation "CFM" stands for cubic feet per minute, a measurement of the flow rate of a volume of air (not to be confused with "psi"). When using an pneumatic-powered tool connected to an air compressor, each tool has a minimum "CFM" rating for optimal operation. The Rental sand blaster power gun is a suction sandblast tool designed for dry abrasive blasting where the air supply is limited or the job is small. The tool is lightweight and compact and ideal where setting up a conventional pressure sandblast machine would be awkward or inconvenient. The rental sand blast power gun can be used with all common media to clean or etch metal, clean masonry, etch glass, and other durable surfaces.  Blast media as suitable for the application. The rental sand blast power gun handles most fine media suitable for blasting. Consult distributor for media recommendation. OSHA recommends against the use of abrasive containing more than 1% free silica.